netdev - Re: [next-queue PATCH v4 3/4] net/sched: Introduce Credit Based Shaper (CBS) qdisc

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Message-Id: <20171005.112909.2052593524154643514.davem@davemloft.net>
Date:   Thu, 05 Oct 2017 11:29:09 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     levipearson@...il.com
Cc:     jiri@...nulli.us, vinicius.gomes@...el.com, netdev@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, andre.guedes@...el.com,
        ivan.briano@...el.com, jesus.sanchez-palencia@...el.com,
        boon.leong.ong@...el.com, richardcochran@...il.com,
        henrik@...tad.us, rodney.cummings@...com
Subject: Re: [next-queue PATCH v4 3/4] net/sched: Introduce Credit Based
 Shaper (CBS) qdisc

From: Levi Pearson <levipearson@...il.com>
Date: Thu, 5 Oct 2017 12:09:32 -0600

> It would be a shame if this were blocked due to a missing software
> implementation.

Quite the contrary, I think a software implementation is a minimum
requirement for inclusion of this feature.

Without a software implementation, there is no clear definition of
what is supposed to happen, and no clear way for people to test those
expectations unless they have the specific hardware.

I completely agree with Jiri.  Hardware offload first is _not_ how
we do things in the Linux networking.